一种PD雷达半实物仿真系统的研究

An Improved Hardware-in-the-Loop SimulationSystem for PD Radar

针对脉冲多普勒雷达在航空火控系统中的广泛应用，提出了一套对脉冲多普勒雷达系统进行半实物仿真的设计方案。以目标回波特性的研究为基础，对目标回波的各种特性进行了模拟。在对目标航迹的模拟中，设计了一种新颖、简单的控制机构。利用频谱搬移解决了多普勒频移难以混频的问题。理论和实验的结果表明，该系统能有效模拟脉冲多普勒雷达的目标回波，具有重要的实际应用价值。

Abstract: In our past research on PD(pulse Doppler) radar simulation, we encounterd two difficulties; (1) the room required for absorbing completely microwave echoes of simulated targets is too big; (2) the Doppler frequency shift, which is of the order of kHz, is very difficult to be mixed into radio frequency signal, which is of the order of GHz. This paper will show how to deal effectively with these two difficulties. In subsection 3. 1, we discuss, with the help of Fig. 3, in detail how to overcome the above-mentioned second difficulty. Fig. 2, as explained in subsection 3. 2, shows how to reduce greatly the size of the room needed for absorbing completely the microwave echoes of simulated targets.